I and some other people noticed that Burning Eyes and Black Knife have very similar drums to Burn in Despair! from Undertale and I think it should be added as a leitmotif for those songs.
Burn in Despair isn’t a motif
Toby just put it on these musics to sound like an old videogame boss and a HEAVY METAL track, respectively.
Also:
So if you don’t know Toby Fox, he is the creator of Undertale and Deltarune and is this thing too 
Bro, just because this is their first post on the wiki doesn't mean they don't know who "Developer of Hit Game Undertale" "Tricky Tony" "Robert" Toby "Radiation" Fox is.
I'd be more surprised if they DIDN'T know who Toby was, considering what wiki we're on.
The Toby “Robert” “Tricky Tony” “Radiation” “John Undertale” “John Deltarune” “I created Undertale” “And Deltarune” “I'm radioactive help” “Earthbound Halloween Hack” “https://undertale.wiki/d/t/burn-in-despair-leitmotif-in-black-knife-and-burning-eyes/807/3 “ Fox Wiki?